JPH0739471A - Upright type vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide a vacuum cleaner excellent in the usability in an upright type vacuum cleaner for household or business use by overcoming problems that a lamp chamber cannot be sufficiently cooled when a dust collecting chamber is filled with dust and dirt, and cooling efficiently the lamp chamber under all using conditions of the cleaner. CONSTITUTION:An exhaust air intake port 51 is provided in a position opposed to an exhaust port 50 of a nozzle part 36. A lamp chamber is connected to the exhaust air intake port 51 through an air flow path 53. An atmosphere intake port 54 is provided in a position close to the nozzle part 36 on the same plane as the exhaust air intake port 51, and a secondary air flow path 52 for interconnecting the air flow path 53 and atmosphere intake port 54 is provided so that a sufficient blow rate of an exhaust air current mixed with air flow of the atmosphere at a low temperature can be sent into the lamp chamber even when dust and dirt are accumulated sufficiently in a dust collecting chamber and a high cooling effect can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a household or professional vertical vacuum cleaner.

[0002]

2. Description of the Related Art In recent years, in vertical vacuum cleaners, high wattage lamps have been developed to improve the usability of cleaning.

A conventional vertical vacuum cleaner will be described below. 12, FIG. 13, FIG. 14, and FIG. 15, reference numeral 1 is a cleaner body (hereinafter referred to as “main body”), which has a motor chamber 3 in which a motor 2 is built in, and a dust collection chamber 4 on the upper suction side.
And a handle 5 is arranged on the upper part.
6 is a motor exhaust port provided in the motor chamber 3, 22 is a cooling auxiliary exhaust port for lamp cooling, and 7 is a lid that covers the dust collection chamber 4 and the motor exhaust port 6, and a partition 8 separates the suction side and the exhaust side. Isolated. Reference numeral 9 denotes a lid exhaust port formed in the lid 7, on which an exhaust filter 10 is detachably arranged. 11 is a motor room 3
A floor nozzle that is pivotally supported on the
Forming 2. Reference numeral 13 denotes a rotary brush which faces the intake port 12, and is driven by the motor 2 via the belt 14. Reference numeral 15 is a hose having one end connected to the intake port 12 and the other end connected to the dust collection chamber 4, and 16 is a dust collection bag disposed in the dust collection chamber 4 and connected to the suction side of the hose 15. Reference numeral 13 is a rotating brush.

Further, in the floor nozzle 11, there is a lamp chamber 19 provided with a lamp 17 for illuminating the floor surface and a reflector plate 18 made of a tin plate or the like, and the lid exhaust port 9 of the floor nozzle 11 is provided.
An exhaust inlet 20 is provided at a position facing the lamp chamber 19
The exhaust inlet 20 is connected with the air flow passage 21 to cool the lamp chamber with the exhaust flow.

By the way, generally, two exhaust structures can be raised due to the design and the addition of an exhaust filter. One is that the position of the exhaust port of the main body is higher than that of the nozzle, and the auxiliary auxiliary exhaust port 22 for cooling is newly provided below the cover exhaust port 9 of the main body as in the structure of FIG. 14, and the other is As shown in FIG. 15, there is an exhaust structure in which the exhaust port 23 of the main body faces the nozzle.

Therefore, in the description of the present invention, the exhaust structure shown in FIG. 14 will be described. This means that the exhaust port in FIG. 15 and the auxiliary cooling exhaust port in FIG. 14 take in an exhaust flow for cooling the nozzle. This is because they have the same meaning when considered from the above, and henceforth, the explanation will be given by unifying them to the exhaust port.

[0007]

When cleaning under the bed or under the desk with the above vertical vacuum cleaner, the lamp for illuminating the floor surface is free from dust and obstacles for the person who cleans it. It is easy to understand and very convenient. Therefore, brighter lamps are required, but bright lamps generate more heat and exceed 100 degrees in some places.
The resin forming the lamp chamber is deformed, and there is a safety problem that the charged part is easily touched, which may cause electric shock or burn.

However, it is not easy to use an expensive resin that can withstand such heat in the nozzle portion, because the cost increases. In addition, there is a method of finely adjusting the angle of the reflecting plate in order to increase the illuminance on the floor surface, but this alone has a limit, and the output of the lamp itself is inevitably increased. That is, when the output of the lamp is increased, the heat causes the problem that the temperature of the nozzle portion near the lamp rises too much.

Further, the lens covering the lamp chamber generally has a structure in which it is fitted with a nail from above so that it can be easily replaced when the lamp burns out. Therefore, there is a safety problem that the lens is removed and the vicinity of the lamp is touched even though the temperature of the lamp is too high. Generally, in the lamp chamber, because the lamp is replaced, the lens part can be removed, or
It can be removed after the case back is removed, and it is not a completely closed room. Therefore, a hole is provided at the top of the lamp,
Although it is possible to cool the lamp by convection of heat, it is not possible to make a hole in the upper cover to form an air passage due to design problems. In addition, the fact is that it cannot be cooled sufficiently.

Therefore, it is conceivable to use the exhaust gas flow of the cleaner body for cooling the lamp chamber, but this method is basically used in both the upright state and the actual use state in addition to the high exhaust temperature. When the exhaust flow cannot be sufficiently sent to the lamp chamber, or when the dust collection chamber has almost no dust or dust, the exhaust temperature is 50 to 60 degrees, the exhaust air velocity is sufficiently high, and the lamp chamber also has a cooling effect. However, when the dust collection chamber becomes full of dust and dirt, the exhaust temperature of the exhaust flow rises and the exhaust air velocity also decreases, which poses a problem that the lamp chamber cannot be cooled sufficiently.

Particularly in the present day when the input power of the motor is increasing due to the competition of power, the exhaust temperature of the motor is also increasing, and countermeasures against the heat problem have become urgent.

Therefore, the present invention solves the above-mentioned conventional problems, and an object thereof is to provide an electric vacuum cleaner having excellent usability by efficiently cooling the lamp chamber even in any state of use of the vacuum cleaner. There is.

[0013]

To achieve this object, the present invention provides, as a first means, a motor chamber below, a dust collection chamber above the motor chamber, and a motor chamber cover that covers the motor chamber from the front. And a dust collection chamber lid on the top of the main body having an exhaust port on the front surface, and a shaft or a hole portion on the side surface of the motor chamber or the motor chamber lid or both.
It consists of a nozzle part with this shaft or hole as the center of rotation. This nozzle part consists of an upper cover and a back cover. The upper cover is equipped with a lamp and a reflector, and the lamp chamber covered by the lens and the motor A belt chamber that drives a belt that transmits rotation to a rotating brush, a brush chamber that sucks dust on the floor,
An intake hose chamber for carrying the dust sucked from the brush chamber to the dust collecting chamber is provided, and an exhaust inlet is provided at a position of the nozzle portion facing the exhaust outlet, and a lamp chamber and an exhaust inlet are provided. In the configuration in which the air flow passages are connected to each other, the air flow passages are connected to an outside air intake port communicating with the outside air of the nozzle portion at a substantially acute angle with respect to the exhaust airflow flowing in the air flow passages.

As a second means, there is a structure in which the outside air intake port is located substantially on the lower surface of the nozzle portion.

As a third means, the outside air intake port is located substantially on the side surface of the nozzle portion.

As a fourth means, an indicator is provided, in which an air flow passage connecting the lamp chamber and the exhaust intake port is provided with a plate coated with a paint whose color changes with temperature, and the color of which can be seen from the appearance of the nozzle. It has a configuration including a mechanism.

As a fifth means, a hole for allowing air to flow is provided between the brush chamber and the lamp chamber, and the opening / closing lid of the hole is made of a shape memory alloy.

[0018]

With the above construction, the first effect is that, along with the flow of the conventional exhaust air flow, the outside air near the room temperature enters the lamp chamber due to the effect of air entrainment from the outside air intake through the secondary air flow passage. The cooling effect of the lamp chamber is increased. Speaking of this cooling effect, the exhaust temperature is 50 to 60 degrees, the exhaust air velocity is sufficiently high, and the lamp chamber also has a cooling effect even when the dust collection chamber is almost free of dust and dirt even with the configuration described in the related art. However, there is a problem that the lamp chamber cannot be cooled sufficiently when the temperature of the exhaust gas rises and the air velocity of the exhaust gas decreases when the dust collection chamber is sufficiently filled with dust and dirt.

However, with this first structure, even when dust and dirt are sufficiently accumulated in the dust collecting chamber, it is possible to send the exhaust flow mixed with the low temperature air flow of the outside air into the lamp chamber with sufficient air volume. it can.

As a second function, when the outside air intake port is provided in the vicinity of the exhaust air intake port, if the outside air intake port is brought to a position facing the auxiliary exhaust port of the main body, the outside air flow passage will pass through the outside air flow passage. Even if outside air near the room temperature is introduced into the lamp chamber through the intake port, it is strongly influenced by the high-temperature exhaust gas flow, so that the cooling effect on the lamp chamber is also halved.

First, even if it is located above the nozzle chamber, it is also strongly affected by the high temperature exhaust gas flow, so that the cooling effect cannot be obtained.

Therefore, according to the second structure, since the outside air intake is brought below the floor nozzle, it is difficult to be influenced by the exhaust flow and the cooling effect of the lamp chamber is not impaired.

Further, when using the furniture nozzle or the floor nozzle with the vacuum cleaner main body in the upright state, there was a problem such as dust flying on the floor surface due to the exhaust air, but the outside air intake is located below the floor nozzle. Therefore, since a part of the exhaust flow passing through the lower part of the floor nozzle is taken into the lamp chamber from the outside air intake, the dust flying on the floor surface due to the exhaust air is also reduced.

As a third function, since the outside air intake is located on the substantially side surface of the nozzle portion, the lamp chamber can be efficiently cooled without being affected by the exhaust gas flow. In addition, since dust and dirt do not enter the lamp chamber through the newly provided outside air introduction path, the reflector, the lens, and the lamp are less contaminated and the lamp illuminance does not decrease.

A fourth effect is that the air flow passage connecting the lamp chamber and the exhaust air intake is provided with a plate coated with a paint that changes color depending on the temperature, so that it changes depending on the amount of dust and dirt in the dust collecting chamber. Reacting to the exhaust temperature of the exhaust stream
A plate coated with a paint that changes color with temperature also changes color every moment. Then, the user can know when to replace the paper bag from the color change.

Also, this indicator mechanism does not have the drawback of lowering the work rate due to air leakage due to the use of the pressure difference from the atmosphere, unlike the one utilizing the pressure change in the dust collecting chamber.

As a fifth action, when the temperature of the exhaust flow from the main body reaches a certain temperature, the opening / closing lid made of a shape memory alloy is opened, the lamp chamber and the brush chamber are connected, and the rotating brush The air flow due to the rotation enters the lamp chamber and cools the lamp chamber.

[0028]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, 31 is a dust box, 32 is a motor chamber, 33 is a handle, 34 is a motor chamber lid, 35 is a dust chamber lid, and 36 is a nozzle portion at the rotation center 37 at the dust box 31, motor chamber lid 34. The nozzle part is composed of an upper cover 38 and a back cover 39, and the upper cover 38 has a lamp chamber 41 having a lamp 40 and is covered with a lens 42. The lamp chamber 41 is provided with a reflection plate 43 that reflects light. Further, 47 is a belt chamber in which a belt 46 that transmits the rotation of the motor 44 to the rotating brush 45 is driven, 48 is a brush chamber that sucks dust on the floor surface, and 49 is dust that is sucked from the brush chamber 48 into the dust collecting chamber 35. An exhaust air inlet 51 is provided at a position facing the intake hose chamber for carrying and the exhaust port 50 of the nozzle portion 36, the lamp chamber 41 and the exhaust air inlet 51 are connected by an air flow passage 53, and one opening 52 is provided.
a is provided so as to form a substantially acute angle in the direction of the exhaust airflow flowing in the air flow passage 53, and the other is communicated with the outside air and the exhaust air intake 51
A secondary air flow passage 52 having an outside air intake 54 located on the same plane as is provided.

The operation of the present embodiment configured as described above will be described with reference to FIGS. 1 and 2.

A part of the exhaust flow discharged from the exhaust port 50 is introduced into the lamp chamber 41 from the outside air intake 54 provided at a position facing the exhaust port 50 of the nozzle portion 36 through the air flow passage 53. However, at this time, the ambient air at room temperature is attracted by the air flow passing through the air flow passage 53 and newly passes through the secondary air flow passage 52 from the outside air inlet 54 to the lamp chamber 41.
Will be introduced to. Therefore, exhaust cooling air having a temperature lower than that of the motor exhaust flow is introduced into the lamp chamber 41.

As described above, according to the present embodiment, even when dust or dust is sufficiently accumulated in the dust collection chamber, the exhaust flow mixed with the low temperature air flow of the outside air is supplied to the lamp chamber with sufficient air volume. It can be sent in and a high cooling effect can be obtained.

Further, according to this structure, the same effect can be obtained even for a floor nozzle of a canister type electric vacuum cleaner having a lamp chamber, a motor and an exhaust structure accompanied therewith in the nozzle portion.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. In FIGS. 3, 4 and 5, 61 is a dust box, 62 is a motor chamber, 6
3 is a handle, 64 is a motor chamber lid, 65 is a dust collection chamber lid, 6
6 is a nozzle part, and a dust box 61 at a rotation center 67,
It is rotatably fixed to a main body composed of a motor chamber lid 64 and a dust collection chamber lid 65, and the nozzle portion is composed of an upper cover 68 and a back lid 69, and the upper cover 68 has a lamp chamber 71 having a lamp 70 and a lens. The lamp chamber 71 covered with 72 is provided with a reflecting plate 73 that reflects light. Further, 77 is a belt chamber driven by a belt 76 for transmitting the rotation of the motor 74 to the rotary brush 75, 78 is a brush chamber for sucking dust on the floor, and 79 is dust collected in the dust chamber 65 for sucking dust from the brush chamber 78. Intake hose chamber for carrying, nozzle 66
The exhaust inlet 81 is provided at a position facing the exhaust outlet 80, and the lamp chamber 71 and the exhaust inlet 82 are connected by the air flow passage 83. The above is the same as the configuration of FIG.
The difference from FIG. 1 is that the outside air intake port 84 is located substantially below the nozzle portion 66, and the air flow passage 83 and the outside air intake port 8 are interposed therebetween.
The secondary air flow passage 85 connecting the four is formed.

The operation of the present embodiment configured as described above will be described with reference to FIGS. 3, 4 and 5.

A part of the exhaust flow discharged from the exhaust port 80 is introduced into the lamp chamber 71 through the air flow passage 83 from the outside air inlet 84 provided at the position of the lower surface of the nozzle portion 66. At this time, the outside air at room temperature is newly introduced into the lamp chamber 71 from the outside air inlet 84 through the secondary air passage 85 by being attracted to the air flow passing through the air passage 83. Therefore, exhaust cooling air having a temperature lower than that of the motor exhaust flow is introduced into the lamp chamber 71.

This is because the outside air intake 84 is located below the nozzle portion 66. In the case of the first embodiment, the outside air intake 84 is provided in the vicinity of the exhaust port 80 even though it is outside air. The outside air that is considerably warmer than room temperature is introduced, but in the case of the second embodiment, the outside air intake 84
Is brought under the nozzle portion 66, it is less likely to be affected by the exhaust flow, and the cooling effect of the lamp chamber 71 is further improved.

Further, when the furniture main body and the floor nozzle are used with the cleaner main body in the upright state, there is a problem that dust is blown on the floor surface due to the exhaust air, but the outside air intake 84 is located below the nozzle portion 66. Since part of the exhaust flow passing through the lower part of the floor nozzle is taken into the lamp chamber 71 from the outside air intake 84, the dust blow on the floor due to the exhaust air is also reduced.

As described above, according to this embodiment, since the outside air intake is brought below the floor nozzle, it is hard to be influenced by the exhaust flow and the cooling effect of the lamp chamber is not impaired.

Further, when the furniture main body and the floor nozzle are used with the cleaner main body in the upright state, there is a problem that dust is blown on the floor surface due to the exhaust air, but the outside air intake is located below the floor nozzle. Therefore, since a part of the exhaust flow passing through the lower part of the floor nozzle is taken into the lamp chamber from the outside air intake, the dust flying on the floor surface due to the exhaust air is also reduced.

Further, according to this structure, the same effect can be obtained even for a floor nozzle of a vacuum cleaner of a canister type, for example, which has a lamp chamber, a motor, and an exhaust structure associated therewith in the nozzle portion.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings. In FIGS. 6 and 7, 91 is a dust box, 92 is a motor chamber, 93 is a handle, 94 is a motor chamber lid, 95 is a dust collecting chamber lid, 96 is a nozzle portion at the rotation center 97, the dust box 91 and the motor chamber lid 94. The nozzle is composed of an upper cover 98 and a back cover 99, and the upper cover 98 has a lamp chamber 101 having a lamp 100 and is covered with a lens 102. Lamp room 101
Is provided with a reflection plate 103 that reflects light. Further, 107 is a belt chamber driven by a belt 106 that transmits the rotation of the motor 104 to the rotating brush 105, 108 is a brush chamber for sucking dust on the floor surface, and 109 is dust collected in the dust chamber 95 from the brush chamber 108. The exhaust hose chamber for carrying and the exhaust port 111 of the nozzle portion 96 are provided at a position facing the exhaust port 110, and the lamp chamber 101 and the exhaust port 1 are provided.
12 are connected by an air flow passage 113, and the above is the same as the configuration of FIG. 1. The difference from FIG. 1 is that the outside air intake port 114 is located substantially on the side of the nozzle portion 96 and the air is interposed therebetween. The secondary air flow passage 115 connecting the flow passage 113 and the outside air intake 114 is formed.

The operation of the present embodiment configured as described above will be described with reference to FIGS. 6 and 7. A part of the exhaust flow discharged from the exhaust port 110 is part of the nozzle portion 96.
Is introduced into the lamp chamber 101 through the air flow passage 113 from the outside air intake 114 provided at the substantially side surface of
At this time, the secondary air flow passage 115 is newly drawn from the outside air intake 114 by being attracted to the air flow passing through the air flow passage 113.
The ambient air at room temperature is introduced into the lamp chamber 101 through. Therefore, the exhaust cooling air much lower in temperature than the motor exhaust flow is introduced into the lamp chamber 101.

This is because the outside air intake port 114 is located substantially on the side of the nozzle portion 96. Therefore, in the case of the first embodiment, the outside air intake port 1 is located near the exhaust port 110 even though it is outside air.
Since 14 is provided, the outside air that is considerably warmer than the room temperature is actually introduced, but in the case of the third embodiment, the cooling effect of the lamp chamber 101 is dramatically improved without being affected by the exhaust flow.

Further, since the outside air intake port 114 is brought to the substantially side surface of the nozzle portion 96, dust and dirt on the floor will not enter the lamp chamber 101, so that the reflector 103, the lens 102, and the lamp are not contaminated. It does not cause a decrease in lamp illuminance.

As described above, according to the present embodiment, since the outside air intake is located on the substantially side surface of the nozzle portion, the lamp chamber can be efficiently cooled without being affected by the exhaust gas flow. it can. In addition, since dust and dirt do not enter the lamp chamber through the newly provided outside air introduction path, the reflector, the lens, and the lamp are less contaminated and the lamp illuminance does not decrease. Further, the life of the lamp can be extended by cooling the lamp itself.

Further, according to this structure, the same effect can be obtained even for a floor nozzle of a vacuum cleaner of a canister type, for example, which has a lamp chamber, a motor and an exhaust structure associated therewith in the nozzle portion.

(Embodiment 4) A fourth embodiment of the present invention will be described below with reference to the drawings. The constructions of FIGS. 8, 9 and 10 are the same as those of FIG. 1. The difference from FIG. 1 is that the paint on the air flow passage 122 connecting the lamp chamber 120 and the exhaust inlet 121 changes color depending on the temperature. A plate 123 coated with is provided in a direction substantially horizontal to the air flow, and a transparent cover 125 is attached to a part of the nozzle portion upper cover so that the user can see the color from the appearance of the nozzle 124. Where it is.

The plate 123 is located between the exhaust inlet 121 and the opening 129a of the secondary air flow passage 129, and the plate 123 can measure the exhaust temperature without being affected by the outside air.

The operation of this embodiment configured as described above will be described with reference to FIGS. 8, 9 and 10.
A part of the exhaust flow discharged from the exhaust port 126 is introduced into the air flow passage 122 from the exhaust intake 121, but since the exhaust flow is constantly in contact with the plate 123, the plate 123 depends on the exhaust temperature. The color will change. Then, in a state where much dust or dirt is not accumulated in the dust collection chamber 127, the exhaust temperature is low and, for example, the plate 123 is green. The exhaust temperature gradually increases as dust and dirt start to accumulate in the dust collecting chamber 127, and the plate 123 also changes color from green to red in response to the exhaust temperature of the exhaust flow. At this time, the secondary air flow passage 129 is newly drawn from the outside air intake port 128 by being attracted to the air flow.
Room temperature outside air is introduced into the lamp chamber 120 through
Since the plate 123 is installed at a position that is not affected by the outside air, it is possible to sufficiently catch the change in exhaust temperature.

As described above, according to the present embodiment, the lamp chamber and the exhaust inlet are connected to each other, and the plate provided with the paint whose color changes with temperature is provided on the air flow passage. From the change, you can know when to replace the paper bag. Also, this indicator mechanism does not have the drawback of lowering the work rate due to air leakage due to the use of the pressure difference with the atmosphere, unlike the one utilizing the pressure change in the dust collection chamber.

In addition, this structure can also obtain the same effect in a floor nozzle having no lamp chamber. Further, according to this configuration,
The same effect can be obtained for a floor nozzle of a canister-type electric vacuum cleaner having a motor and an exhaust structure associated with the motor in the nozzle portion.

(Embodiment 5) A fifth embodiment of the present invention will be described below with reference to the drawings. The structure of FIG. 11 is the same as that of FIG. 1, except that a hole for allowing air to flow is provided between the brush chamber and the lamp chamber, and the opening / closing lid of the hole has a shape memory alloy. It's about to take the configuration that I decided to make.

The operation of the present embodiment configured as described above will be described with reference to FIG. A part of the exhaust flow discharged from the exhaust port 130 when the exhaust temperature is low is introduced into the lamp chamber 133 from the exhaust inlet 131 through the air flow passage 132. The ambient air is attracted to the flow and newly introduced into the lamp chamber 133 from the ambient air intake 133 through the secondary air flow passage 134.

However, when the exhaust temperature is high, 8
The opening / closing lid 135 made of a shape memory alloy, which is set so that its shape is deformed around 0 degree, is opened, and the air flow caused by the rotation of the rotating brush 136 is sent to the lamp chamber 133 and cooled at room temperature.

At this time, the filter 136 is installed on the opening / closing lid 135 so that dust on the floor does not enter the lamp chamber 133.

As described above, according to this embodiment, the exhaust gas temperature is increased under a severe condition in which the user cleans the dust collecting chamber with a vacuum cleaner in a high temperature room. Even when the lamp chamber cannot be cooled because it rises extremely and the exhaust flow rate also decreases extremely, the opening / closing lid made of shape memory alloy opens and the air flow due to the rotation of the rotating brush is applied to the lamp chamber. Therefore, a sufficient cooling effect can be obtained.

Even when used under abnormal conditions as described above, the resin forming the lamp chamber is not deformed, the charging part is easily touched, and there is no risk of electric shock or burns. Also, safety can be secured.

Considering the flow of air through the opening / closing lid, it seems that air is generally pulled back from the lamp chamber to the brush chamber by the suction cushion by the intake air. The flow is superior, and the air flow is from the brush chamber toward the lamp chamber, so the cooling effect is great. For example, even the resin portion of the lamp chamber, which has a temperature of 100 degrees, is cooled to about 50 degrees.

Further, according to this structure, the same effect can be obtained even for a floor nozzle of a canister type electric vacuum cleaner having a motor in the nozzle portion and an exhaust structure associated therewith.

[0060]

As described above, in the electric vacuum cleaner of the first aspect of the present invention, the air intake is provided in the nozzle portion so as to face the exhaust port arranged in the motor chamber of the main body and is connected to the lamp chamber. In addition to forming a passage, by connecting an outside air intake that communicates with the outside air of the nozzle portion to this air passage at a substantially acute angle to the direction of the exhaust air flowing in the air passage, a new outside air inlet is added to the nozzle portion. By providing the air flow passage and the outside air intake port in close proximity to each other, the outside air can be introduced by the trapping effect, and the effect of cooling the heat generated by the lamp can be obtained.

Further, in the electric vacuum cleaner of the second aspect of the present invention, the outside air intake is located substantially on the lower surface of the nozzle portion, so that it is difficult to be affected by the exhaust flow and the cooling effect of the lamp chamber is not impaired.

Also, dust flying on the floor surface due to exhaust air when using the furniture nozzle or the floor nozzle with the cleaner main body in the upright state is reduced.

In the vacuum cleaner of the third aspect of the present invention, the outside air intake port is located substantially on the side surface of the nozzle portion, so that the lamp chamber can be efficiently cooled without being affected by the exhaust flow. . In addition, since dust and dirt do not enter the lamp chamber through the newly provided outside air introduction path, the reflector, the lens, and the lamp are less contaminated and the lamp illuminance does not decrease. Further, the life of the lamp can be extended by cooling the lamp itself.

In the electric vacuum cleaner of the fourth invention, a plate coated with a paint that changes color depending on temperature is provided on the air flow passage connecting the lamp chamber and the exhaust air intake port, and the air flow passage is the air flow passage. By installing a high visibility indicator mechanism that allows the color to be seen from the appearance of the nozzle between the position where it intersects with the above-mentioned exhaust intake, the user can change the paper bag from this color change. You can know. Also, this indicator mechanism does not have the drawback of lowering the work rate due to air leakage due to the use of the pressure difference with the atmosphere, unlike the one utilizing the pressure change in the dust collection chamber.

Further, in the electric vacuum cleaner of the fifth invention, a hole for allowing air to flow is provided between the brush chamber and the lamp chamber,
And because the opening and closing lid of the hole is made of shape memory alloy,
Even under severe conditions, such as when a user cleans the dust collection room with a vacuum cleaner in a high temperature room, the resin that composes the lamp room will deform and the charging section will be easily There is no risk of electric shock or burns.

As described above, it is possible to provide the electric vacuum cleaner which is highly safe and economical for the user and has excellent usability.

[Brief description of drawings]

FIG. 1 is a partial sectional view of an essential part showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a vertical vacuum cleaner showing the first embodiment of the present invention.

FIG. 3 is a perspective view of a vertical vacuum cleaner showing a second embodiment of the present invention.

FIG. 4 is a back sectional view of a floor nozzle showing a second embodiment of the present invention.

FIG. 5 is a partial vertical cross-sectional view of a main part showing a second embodiment of the present invention.

FIG. 6 is a partial sectional view of an essential part showing a third embodiment of the present invention.

FIG. 7 is a perspective view of a vertical vacuum cleaner showing a third embodiment of the present invention.

FIG. 8 is a partial vertical cross-sectional view of a main part showing a fourth embodiment of the present invention.

FIG. 9 is a perspective view of a vertical vacuum cleaner showing a fourth embodiment of the present invention.

FIG. 10 is a partial sectional view of an essential part showing a fourth embodiment of the present invention.

FIG. 11 is a partial sectional view of an essential part showing a fifth embodiment of the present invention.

FIG. 12 is an overall external perspective view of a conventional vacuum cleaner.

FIG. 13 is a rear sectional view of a floor nozzle of the electric vacuum cleaner.

FIG. 14 is a vertical sectional view of the entire electric vacuum cleaner.

FIG. 15 is a vertical sectional view of the entire electric vacuum cleaner.

[Explanation of symbols]

 50 Exhaust Port 51 Exhaust Inlet 52 Secondary Air Flow Passage 53 Air Flow Passage 54 Outside Air Intake

Claims (5)

[Claims] 1. A nozzle part having a brush chamber in which a rotary brush for scraping up dust on the intake port and the floor surface is arranged on the front surface and a lamp chamber provided with a lamp for irradiating the front floor surface in the vicinity of the brush chamber. A motor chamber with a built-in motor and a dust collecting chamber with a dust bag inside are connected to the lower part of the main body so that the lower part can tilt, and the nozzle part faces the exhaust port arranged in the motor chamber of the main part. An exhaust air intake is provided in the lamp chamber to form an air flow passage that is connected to the lamp chamber, and an outside air intake that communicates with the outside air of the nozzle portion is connected to the air flow passage at a substantially acute angle to the exhaust airflow flowing in the air flow passage. Vertical vacuum cleaner characterized by being. 2. The vertical vacuum cleaner according to claim 1, wherein the outside air intake is located substantially on the lower surface of the nozzle portion. 3. The vertical vacuum cleaner according to claim 1, wherein the outside air intake is located on a substantially side surface of the nozzle portion. 4. A plate coated with a paint that changes color according to temperature is provided on the air flow passage connecting the lamp chamber and the exhaust air intake port, and at a position where the air flow passage intersects the air flow passage and the exhaust air intake port. 2. The vertical vacuum cleaner according to claim 1, further comprising an indicator mechanism which is provided between the nozzles and the color of which is visible from the appearance of the nozzle. 5. A hole for allowing air to flow between the brush chamber and the lamp chamber, and an opening / closing lid for the hole is made of a shape memory alloy. V-shaped vacuum cleaner.